46774 viagra factsheet
Sexual Dysfunction Association
www.sda.uk.net Email: [email protected]
VIAGRA (sildenafil) is the first oral treatment for erectile dysfunction (impotence) to be licenced in
the UK. This fact sheet provides basic information on VIAGRA; for more detailed information you
should consult your doctor.
What is VIAGRA?
VIAGRA belongs to a group of medicines called phosphodiesterase type 5 inhibitors. It
is a blue, diamond shaped, oral tablet prescribed to treat men suffering from clinical
erectile dysfunction. It is not an aphrodisiac and does not increase libido.
VIAGRA works in a natural way, so sexual stimulation will be required.
VIAGRA works by helping to relax the blood vessels in the penis, allowing blood to flow
into the penis causing an erection. However, VIAGRA works naturally and will only
help a man to get an erection if he is sexually stimulated. It should not be taken by
men who do not have erectile dysfunction.
How do you take
VIAGRA is available in three strengths - 25mg, 50mg and 100mg. The initial dose is
selected by the doctor, based on need. VIAGRA should be swallowed whole with some
water about an hour before anticipated sexual activity. The amount of time it takes to
work varies from person to person, but VIAGRA works quickly, on average 25 minutes,
but may be as soon as 12 minutes. Within a 4 to 6 hour period after taking the tablet
an erection should occur in response to sexual stimulation. A man may find that
VIAGRA takes longer to work if taken with a heavy meal.
Alcohol consumption can temporarily interfere with the erection process. To get the
maximum benefit from the medication it is advisable not to drink large amounts of
alcohol before taking VIAGRA, as alcohol can impair sexual activity.
VIAGRA should not be used more than once a day. Do not take VIAGRA
with other medicines unless your doctor tells you that you can.
What side effects
The manufacturers have tested the drug on nearly 13,000 men during 13 completed
may be associated
and ongoing clinical trials. When taken at the recommended doses some side effects
have been reported although they were generally mild to moderate and brief in length.
The most common side effects are headache and facial flushing. Less commonly
reported are indigestion, dizziness, stuffy nose and effects on vision (predominantly a
blue colour tinge to vision and increased brightness of light or blurred vision).
Who cannot take
Patients who are taking any medicines containing nitrates. These medicines are
commonly prescribed for relief of angina pectoris “chest pain”. In combination with
VIAGRA they could seriously lower blood pressure. Patients should inform their Doctor
if they are taking any of these medicines or ask if they are not certain.
Who cannot take
Known hypersensitivity to any component of the drug VIAGRA.
Recent stroke, heart attack, or low blood pressure, or in men for whom sexual activity is
Certain rare inherited eye diseases (such as retinitis pigmentosa).
VIAGRA should not be taken in combination with other erectile dysfunction treatments.
Patients should not take VIAGRA (50mg 0r 100mg) within 4 hours of taking an alpha
may prevent a
Diseases that might result in prolonged erection e.g. sickle cell anaemia (an abnormality
of red blood cells), multiple myeloma (cancer of bone marrow) or leukemia (cancer of
Bleeding disorders (such as haemophilia) or peptic ulceration (stomach ulcer).
Can women take
VIAGRA should not be taken by women. It is not licensed for use in women and it’s
safety in women has not been tested.
What happens if I
An increase in dose should always occur under close medical supervision. Clinical trials
have shown that increasing the drug beyond the maximum recommended dose of
100mg simply increases the side effects and not the efficacy.
If you feel you need a higher dose talk to your doctor. Men with diabetes have been
shown to need to take 100mg preferentially.
Can I drive while
VIAGRA can cause dizziness and effects on vision. Patients should be aware of how
they react to the drug before they drive or operate machinery.
Will it work for
If Viagra does not help you to get an erection, or your erection does not last long
enough for you to complete your chosen sexual activity you should tell your doctor
It may be appropriate for you to try the higher dose
of Viagra. However it can take several attempts to get back into practice again.
There are other effective treatment options available and information can be obtained
from your doctor or the Sexual Dysfunction Association.
. to enrol as a friend of the Sexual Dysfunction Association. For a small annual
subscription, you will receive copies of One in Ten, the Association’s newsletter and you
will be contributing to an Association which helps overcome the problems of male and
female sexual dysfunction. If you are interested, please telephone or write for an
Telephone Helpline 0870 7743571
J. Chem. Thermodynamics 40 (2008) 1661–1665Thermodynamic properties of caffeine: Reconciliation of availableexperimental dataVladimir N. Emel’yanenko, Sergey P. Verevkin *Department of Physical Chemistry, University of Rostock, Hermannstrasse 14, D-18051 Rostock, GermanyMolar enthalpies of sublimation of two crystal forms of caffeine were obtained from the temperaturedependence of the
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